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160 lines
4.2 KiB
160 lines
4.2 KiB
5 years ago
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Particle3D=function(material){
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THREE.Particle.call(this,material);
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this.velocity=new THREE.Vector3(0,-8,0);
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this.velocity.rotateX(randomRange(-45,45));
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this.velocity.rotateY(randomRange(0,360));
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this.gravity=new THREE.Vector3(0,0,0);
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this.drag=1;
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};
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Particle3D.prototype=new THREE.Particle();
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Particle3D.prototype.constructor=Particle3D;
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Particle3D.prototype.updatePhysics=function(){
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this.velocity.multiplyScalar(this.drag);
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this.velocity.addSelf(this.gravity);
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this.position.addSelf(this.velocity);
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}
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var TO_RADIANS=Math.PI/180;
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THREE.Vector3.prototype.rotateY=function(angle){
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cosRY=Math.cos(angle*TO_RADIANS);
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sinRY=Math.sin(angle*TO_RADIANS);
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var tempz=this.z;;
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var tempx=this.x;
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this.x=(tempx*cosRY)+(tempz*sinRY);
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this.z=(tempx*-sinRY)+(tempz*cosRY);
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}
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THREE.Vector3.prototype.rotateX=function(angle){
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cosRY=Math.cos(angle*TO_RADIANS);
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sinRY=Math.sin(angle*TO_RADIANS);
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var tempz=this.z;;
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var tempy=this.y;
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this.y=(tempy*cosRY)+(tempz*sinRY);
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this.z=(tempy*-sinRY)+(tempz*cosRY);
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}
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THREE.Vector3.prototype.rotateZ=function(angle){
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cosRY=Math.cos(angle*TO_RADIANS);
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sinRY=Math.sin(angle*TO_RADIANS);
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var tempx=this.x;;
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var tempy=this.y;
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this.y=(tempy*cosRY)+(tempx*sinRY);
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this.x=(tempy*-sinRY)+(tempx*cosRY);
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}
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function randomRange(min,max){
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return((Math.random()*(max-min))+ min);
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}
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var SCREEN_WIDTH = window.innerWidth;
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var SCREEN_HEIGHT = window.innerHeight;
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var container;
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var particle;
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var camera;
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var scene;
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var renderer;
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var mouseX = 0;
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var mouseY = 0;
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var windowHalfX = window.innerWidth / 2;
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var windowHalfY = window.innerHeight / 2;
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var particles = [];
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var particleImage = new Image();//THREE.ImageUtils.loadTexture( "img/ParticleSmoke.png" );
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particleImage.src = 'https://cdn.yimian.xyz/xuehua/ParticleSmoke.png';
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function init() {
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container = document.createElement('div');
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document.body.appendChild(container);
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camera = new THREE.PerspectiveCamera( 75, SCREEN_WIDTH / SCREEN_HEIGHT, 1, 10000 );
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camera.position.z = 1000;
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scene = new THREE.Scene();
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scene.add(camera);
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renderer = new THREE.CanvasRenderer();
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renderer.setSize(SCREEN_WIDTH, SCREEN_HEIGHT);
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var material = new THREE.ParticleBasicMaterial( { map: new THREE.Texture(particleImage) } );
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for (var i = 0; i < 500; i++) {
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particle = new Particle3D( material);
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particle.position.x = Math.random() * 2000 - 1000;
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particle.position.y = Math.random() * 2000 - 1000;
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particle.position.z = Math.random() * 2000 - 1000;
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particle.scale.x = particle.scale.y = 1;
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scene.add( particle );
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particles.push(particle);
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}
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container.appendChild( renderer.domElement );
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document.addEventListener( 'mousemove', onDocumentMouseMove, false );
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document.addEventListener( 'touchstart', onDocumentTouchStart, false );
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document.addEventListener( 'touchmove', onDocumentTouchMove, false );
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setInterval( loop, 1000 / 60 );
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}
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function onDocumentMouseMove( event ) {
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mouseX = event.clientX - windowHalfX;
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mouseY = event.clientY - windowHalfY;
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}
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function onDocumentTouchStart( event ) {
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if ( event.touches.length == 1 ) {
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event.preventDefault();
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mouseX = event.touches[ 0 ].pageX - windowHalfX;
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mouseY = event.touches[ 0 ].pageY - windowHalfY;
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}
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}
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function onDocumentTouchMove( event ) {
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if ( event.touches.length == 1 ) {
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event.preventDefault();
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mouseX = event.touches[ 0 ].pageX - windowHalfX;
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mouseY = event.touches[ 0 ].pageY - windowHalfY;
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}
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}
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//
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function loop() {
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for(var i = 0; i<particles.length; i++)
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{
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var particle = particles[i];
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particle.updatePhysics();
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with(particle.position)
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{
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if(y<-1000) y+=2000;
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if(x>1000) x-=2000;
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else if(x<-1000) x+=2000;
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if(z>1000) z-=2000;
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else if(z<-1000) z+=2000;
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}
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}
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camera.position.x += ( mouseX - camera.position.x ) * 0.05;
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camera.position.y += ( - mouseY - camera.position.y ) * 0.05;
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camera.lookAt(scene.position);
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renderer.render( scene, camera );
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}
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